Php 在考虑父键的同时展平数组

我需要展平阵列，同时确保没有重复的关键点

例如，假设我有：

$arr = array(
    $foo = array(
        'donuts' => array(
                'name' => 'lionel ritchie',
                'animal' => 'manatee',
            )
    )
);

我需要一个扁平阵列，如下所示：

$arr = array(
     'donuts name' => 'lionel ritchie',
     'donuts animal' => 'manatee',
);

$arr = array(
    $foo = array(
        'donuts' => array(
                'name' => 'lionel ritchie',
                'animal' => 'manatee',
            )
    )
);

// Will loop 'donuts' and other items that you can insert in the $foo array.
foreach($foo as $findex => $child) {
      // Remove item 'donuts' from array, it will get the numeric key of current element by using array_search and array_keys
      array_splice($foo, array_search($findex, array_keys($foo)), 1); 
      foreach($child as $index => $value) {
            // Adds an array element for every child
            $foo[$findex.' '.$index] = $value;
      }
}

它需要工作，即使我们有超过1个父密钥

我有以下代码，但我不确定我是否可以使用它

foreach (new RecursiveIteratorIterator(new RecursiveArrayIterator($array1)) as $k=>$v){
   $array1c[$k] = $v;
}

---

做起来很简单，就这样做：

$arr = array(
     'donuts name' => 'lionel ritchie',
     'donuts animal' => 'manatee',
);

$arr = array(
    $foo = array(
        'donuts' => array(
                'name' => 'lionel ritchie',
                'animal' => 'manatee',
            )
    )
);

// Will loop 'donuts' and other items that you can insert in the $foo array.
foreach($foo as $findex => $child) {
      // Remove item 'donuts' from array, it will get the numeric key of current element by using array_search and array_keys
      array_splice($foo, array_search($findex, array_keys($foo)), 1); 
      foreach($child as $index => $value) {
            // Adds an array element for every child
            $foo[$findex.' '.$index] = $value;
      }
}

var\u转储的结果（$foo）将是：

array(2) {
  ["donuts name"]=>
  string(14) "lionel ritchie"
  ["donuts animal"]=>
  string(7) "manatee"
}

试试看：）
它不应该是递归的吗？假设我们有10个父对象。是的，试着创建一个递归执行这些操作的函数。